Fish | Earth Sciences New Zealand | NIWA

On 1 July 2025, NIWA merged with GNS Science to become Earth Sciences New Zealand.

Link to source page

Freshwater pest species

This is a user guide on non-native fish, reptile, invertebrate, algal and plant species that are recorded in New Zealand freshwaters.

Invasive species

Fish

Freshwater fish
Link to source page

Identifying the problem

Identifying the factors causing fish numbers to drop will allow you to determine which restoration tools you need to employ.

Fish

Freshwater

Freshwater fish